Numbers k such that the k-th standard ordered rooted tree is binary.

A358375

Numbers k such that the k-th standard ordered rooted tree is binary.

Terms

    a(0) =1a(1) =4a(2) =18a(3) =25a(4) =137a(5) =262146a(6) =393217a(7) =2097161a(8) =2228225

External references